The Ring,retaining, cataloged under National Stock Number 5325-01-644-3366, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-644-3366 |
| Primary Part Number | 12446399 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Material Hardness Rating | 43.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 15.325 INCHES MINIMUM AND 15.575 INCHES MAXIMUM IN |
| Major Thickness | 0.122 INCHES MINIMUM AND 0.128 INCHES MAXIMUM IN |
| Inside Diameter | 14.316 INCHES NOMINAL IN |
| Ring Style | INTERNAL STEPPED |
| Material | STEEL COMP 1060 OR STEEL COMP 1070 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12446399 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5325-01-644-3366 is a Ring,retaining, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-644-3366 has 1 manufacturer part number on file: 12446399 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12446399: Material Hardness Rating: 43.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 15.325 INCHES MINIMUM AND 15.575 INCHES MAXIMUM IN; Major Thickness: 0.122 INCHES MINIMUM AND 0.128 INCHES MAXIMUM IN. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.